Lacquer bullet gun barrel

ABSTRACT

A lacquer bullet gun barrel having an inner wall, on which a plurality of projections are circularly arranged. The projections are separated by vent grooves and have top surfaces which form a broken circular circumference around a firing path for a lacquer bullet. Thus a reduced contact surface between the lacquer bullet and the inner wall results.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a lacquer bullet gun barrel, particularly to a lacquer bullet gun barrel for an increased shooting range and with automatic removing of remaining lacquer material of a burst lacquer bullet.

[0003] 2. Description of Related Art

[0004] In popular war games, war scenes are simulated, providing for interesting and exciting entertainment and training physical capabilities, which is appealing especially to young people. Shortcomings encountered during firing of lacquer bullets are an insufficient shooting range and the occurrence of burst lacquer bullets, leading to slipping of a subsequent lacquer bullet in a bullet chamber. The reason for this is a design of barrels that is flawed.

[0005] As shown in FIG. 6, a conventional lacquer gun barrel has an acceleration tube 30. For reducing friction between a lacquer bullet and an inner wall of the barrel, a row of vent holes 40 is cut along the acceleration tube 30. When pressurized gas is released through the vent holes 40, resulting gas flow separates the lacquer bullet and the inner wall of the barrel. However, while the lacquer bullet is pushed ahead, release of gas through the vent holes 40 reduces gas pressure and the lacquer bullet is pushed with less force, resulting in a reduced shooting range.

[0006] Furthermore, during firing of a lacquer bullet, often excessive force by pressurized gas is applied to the lacquer bullet, so that the lacquer bullet bursts. Remains of the burst lacquer bullet impair further shooting, blocking the barrel. For continued use, the lacquer gun has to be first disassembled and cleaned.

SUMMARY OF THE INVENTION

[0007] It is the main object of the present invention to provide a lacquer bullet gun barrel allowing for an increased shooting range.

[0008] Another object of the present invention is to provide a lacquer bullet gun barrel which automatically removes remains of a burst lacquer bullet.

[0009] The present invention can be more fully understood by reference to the following description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 is a cross-sectional view of the lacquer bullet gun barrel of the present invention in the first embodiment.

[0011]FIG. 2 is a perspective view of a section at the front end of the lacquer bullet gun barrel of the present invention in the first embodiment.

[0012]FIG. 3 is a perspective view of a section at the front end of the lacquer bullet gun barrel of the present invention in the second embodiment.

[0013]FIG. 4 is a perspective view of a section at the front end of the lacquer bullet gun barrel of the present invention in the third embodiment.

[0014]FIG. 5 is a cross-sectional view of the lacquer bullet gun barrel of the present invention in the fourth embodiment.

[0015]FIG. 6 is a sectional side view of a conventional lacquer bullet gun barrel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] As shown in FIGS. 1 and 2, the lacquer bullet gun barrel of the present invention in a first embodiment has an inner wall 60 with a plurality of projections 70 and a plurality of vent grooves 80 between the projections 70. The projections 70 have top surfaces 71 that form a circumference of a space passed through by fired lacquer bullets. Friction between lacquer bullets and the inner wall 60 is reduced by gas flow along the vent grooves 80, as explained below in detail.

[0017] The projections 70 are formed as elongated strips that are arranged on the inner wall 60. The inner surfaces 71 are curved, forming a broken circumference enclosing a cylindrical space. Thus a firing path for lacquer bullets is determined in a sufficient way. During firing of a lacquer bullet, friction is reduced due to a reduced contact surface, so that a larger shooting range results. Reduced friction also results in a smaller number of burst lacquer bullets.

[0018] The vent grooves 80 are disposed between the projections 70, having bottom surfaces that coincide with the inner wall 60. Each of the vent grooves 80 provides a path for venting gas. When a lacquer bullet is fired, gas flows through the vent grooves 80, further reducing friction, ensuring high efficiency of the lacquer gun. If bursting of a lacquer bullet happens, remains thereof naturally mostly stay in the vent grooves 80. Any remains on the projections 70 will be pushed partly into the vent grooves 80 and partly out of the barrel when a subsequent lacquer bullet is fired. Therefore, slipping of a subsequent lacquer bullet in a bullet chamber is largely reduced. The design of the present invention ensures automatic cleaning by a subsequent lacquer bullet pushing out remains on the projections 70 or in the vent grooves 80, so that stopping an ongoing game for disassembling and manual cleaning is not necessary.

[0019] The vent grooves 80 extend from a front end to a rear end of the barrel or along a section of the barrel at the front end thereof.

[0020] The projections 70 reduce friction of fired lacquer bullets, increasing shooting power of the lacquer gun. The vent grooves 80 provide gas flow paths, further reducing friction of fired lacquer bullets. In the event of a burst lacquer bullet, the vent grooves temporarily accommodate remains thereof, preventing that a subsequent lacquer bullet bursts as well, blocking the barrel.

[0021] For adapting to various materials of lacquer bullets as well as to various shooting functions (e.g. using N₂ or CO₂ gas) the projections 70 and the vent grooves 80 are suitably adjusted. For example, the areas of the top surfaces 71 of the projections are enlarged or diminished, increasing or reducing the contact surface, or the heights of the projections 70 are increased or reduced to increase or reduce the volume of the plurality of vent grooves 80.

[0022] Referring to FIG. 3, the present invention in a second embodiment has projections 70 a, each having inclined side walls 72 a further reducing the contact surface between a lacquer bullet and the projections 70 a. The side walls 72 a allow for additional air flow. When a lacquer bullet bursts, the remains thereof readily enter vent grooves 80 a along the side walls 72 a, reducing refuse on top surfaces 71 a of the projections 70 a and slipping of a subsequent lacquer bullet in a bullet chamber.

[0023] Referring to FIG. 4, the present invention in a third embodiment has side walls 72 a with rounded edges 73 a.

[0024] Referring to FIG. 5, the present invention in a fourth embodiment has projections 70 b with convex cross sections, minimizing the contact surface between a lacquer bullet 100 and ensuring better flow when a lacquer bullet is fired. When a lacquer bullet bursts, the remains thereof more readily enter vent grooves 80 b.

[0025] While the invention has been described with reference to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention which is defined by the appended claims. 

1. A lacquer bullet gun barrel, comprising: a barrel case with an inner wall, having a plurality of projections that are circularly arranged, separated by vent grooves and have top surfaces which form a broken circular circumference around a firing path for a lacquer bullet, so that a reduced contact surface between said lacquer bullet and said inner wall results.
 2. A lacquer bullet gun barrel according to claim 1, wherein said projections and said vent grooves linearly extend from a front end of said barrel case to a rear end of said barrel case.
 3. A lacquer bullet gun barrel according to claim 1, wherein said projections and said vent grooves linearly extend along a section of said barrel case at a front end thereof.
 4. A lacquer bullet gun barrel according to claim 1, wherein said projections have inclined side walls.
 5. A lacquer bullet gun barrel according to claim 1, wherein said projections have rounded edges.
 6. A lacquer bullet gun barrel according to claim 1, wherein said projections have convex cross sections. 